Bl This standard establishes the characteristics and test methods of the fluid used in hydraulic mechanisms of certain parts of aircraft, such as shock absorbers and brakes, where it is in contact with natural rubber gaskets. B-2 This fluid should not be used in aircraft parts where it may come into contact with synthetic rubber gaskets.
IRAM 6573-1958 history
1958IRAM 6573-1958 Aviation products. Hydraulic fluids in direct contact with natural rubber and derived from castor oil